Variation and association of morphological and biochemical characters in grass pea (Lathyrus sativus L.) |
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Authors: | Wuletaw Tadesse Endashaw Bekele |
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Institution: | (1) Adet Agricultural Research Center, P.O. Box 8, Bahir Dar, Ethiopia;(2) Department of Biology, Addis Ababa University, P.O. Box 1176, Addis Ababa, Ethiopia |
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Abstract: | Fifty grass pea land race populations of Ethiopia that were selected based on administrative regions and different altitude
classes were used in this study to determine variability in morphological characters, Oxalyl Diamino Propanoic acid(ODAP)
– a causative agent of lathyrism, and protein contents and their associations. Highly significant differences were observed
among the populations for most of the morphological characters. Populations collected from Gondar region and the higher altitude
group (>2550 m) showed the highest mean and coefficient of variation indicating the presence of high genetic diversity in
this region and altitude group. ODAP analysis from single plants showed significant variation both within a population and
between populations. Four individual plants with low ODAP contents ranging from 0.149% to 0.182% (range within safe level)
were identified in populations collected from different regions, indicating the diversity and variation of this trait with
in one population and between regions. These low ODAP lines are considered important for further breeding. The association
of ODAP with grain yield, biomass, plant height and seed size was negative, suggesting that the selection of tall and late
maturing varieties with large seed size and high grain yield potential will enable the development of varieties with low ODAP
content.
This revised version was published online in August 2006 with corrections to the Cover Date. |
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Keywords: | association grass pea ODAP protein variation |
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